Telephone switch



Oct. '27, 1925; 1,558,944

H. B. TAYLOR TELEPHONE SWITCH Filed Aug. 17. 1923 Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

HERBERT B. TAYLOR, OF WESTFIELD, NEW JERSEY, ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

TELEPHONE SWITCH.

Application filed August 17, 1923.

To all whom z't may concern:

Be it known that I, HERBERT B. TAYLOR,

acitizen of the United States of America, residing at WVestfield, in the county of Union and State of New Jersey, have invented certain new and useful Improve ments in Telephone Switches, of which the following is a full, clear, concise, and exact description. This invention relates in general to telephone switches, and specifically to a coordinate switch structure adapted for establishing connections in an automatic or semiautomatic telephone system.

The object of the invention is to provide a switch of this character in which the operating parts are readily accessible for adjustment or repairs and wherein the number of operating parts is reduced to a minimum.

In accordance with the foregoing object, a feature of the invention resides in the provision of means whereby setsof multiple-Ll secondary contacts are moved, into engagement with sets of primary contacts through the movement of an oscillating or rocking bar.

Another feature resides in the provision of means whereby the primary contacts are moved collectively through the movement of a selecting bar into engageable relation with associated contacting lugs which are movable along the arc of a circle andare adapted to move the primary contacts into position wherein a subsequent movement of the selecting bar is ineffective to disturb the connection already established.

Another feature is the provision of means whereby the free end portions of primary contacts, having a relativelysmall initial tension, are moved against a stop bar adapted to resist the movement of the active contact in order to secure the requisite contact the contacting lugs when they are brought into contact through a n'iovement of the oscillating bar.

Other-features and advantages will appear from the following description and by the claims appended thereto, reference being had to the accompanying drawings in which Fig. 1 is a plan view of said switch; Fig. 2 is a right-hand side view thereof; and Fig. 3 is a partial front view of a selecting bar.

Similar reference characters refer to similar parts throughout the several views.

Serial- No. 657,907.

Each set of primary contacts consists of a plurality of flat contact springs 20, 21, 22 and 23, moulded into individually removable insulating blocks 24 which are held securely on horizontally disposed angle-shaped bars 25 by means of screws 19. The brackets 17 and 18 are generally formed integrally with the plates 26 and 27 and are provided for supporting the bars 25 which are secured at each end on inwardly extending lugs and 16 by means of screws or rivets.

For each vertical row of primary contacts 20, 21, 22 and 23, there is provided a longitudinally movable bar 28 on which an insulating strip 29 is secured by means of rivets 30. Each strip 28 and 29 has a plurality of equally spaced apertures 31 and 32 which register with each other, and through which the free end portions of primary contacts 20, 21, 22 and 23 of each set protrude in juxtaposition with the multipled contacting lugs 33, 34, 35 and 36. Such multiple contacting lugs are punched out of flat metal strips 37, 38, 39 and 40 and insulatingly arranged on an oscillating bar 41 shown in Figs. 1 and 2. It is to be noted, however, that due to the difference in the dimension of apertures 31 and 32, the active contacts 20, 21, 22 and 23 normally rest on the edge of aperture 32 in the insulating strip 28 in order to insure proper insulation between the sets of primary contacts. pressure between the primary contacts and The switch structure may comprise any number of primary contact sets 20, 21. 22

and 23 and any number of sets of multipled contacting lugs 33, 34, 35 and 36, depending upon the switch capacity desired.

The oscillating bars 41 are each securely arranged on a rotatable bar 42, journaled at each end portion on the flanges 26 and 27 and held loosely in position thereon by means of individually removable hook members 43, which are held in adjusted position on the plates 26 and 27 by means of screws 44. The adjustable stops 45 and 46, are integrally formed with plates 26 and 27 and are provided for holding the oscillating bar 41 and the contacting lugs 33, 34,35 and 36 served thereby in normal non-operated position with reference to their associated primary contacts 0, 21, 22 and 23, etc.. On one end of each bar 42 there is provided a bell crank lever 47 having apin 4:8,. extending laterally therefrom, in operable relation with a magnet armature d9 adaptedto rotate the bar 4L2 for imparting; an oscillating movement to' the bar all and the contacting lugs 33, 84:, 35 and 36 carried thereby in response to each energization 0-1": an electromagnet 50.

For each bar 28, there is provided an armature 51 the free end of which protrudes through an aperture on the top: of the bar 28 and is adapted to move the bar 28 and the primary contacts 21, 22* and 23, served 7 thereby in selected position in response to Cir each energizationof an operating electrom-a'gnet. The bars 28 are each slidably arranged in the slots 5% at the cross-bars which: are rigidly tastened on the top and lower end portions otthe plates 26 and 27. E01 sake of clearness, however, only the top cross-bar is shown Figs; 1 and 2.

Associated with each horizontal row of primarycontacts 20, 21, 22 and 23,, there is provided insulating bar56 held securely at. each end portion on flanges 26 and 2.? and which is adapted to.- resist the up ard IILQ'VC, ment of the primary contacts with which they are associated for securing the requisite Contact pressure between. the contacting lugs 33, 3-5 and 3 6: and the primary contacts 20,2 1,, 22 and 23, when the bar 41-1 is, moved in operated position. lit is. to be noted that when the contacting. lug-s 33, 34, 355 and, 3-6 are moved in operated position, as shown by the lower contact set in ]5-i,g ;..v 2, the primary contacts. 2,. '21, 22 and 23 associated therewith are moved entirely clear of the bar 28 against the insulating bar 56, wherein any subsequent movement otthe bar 28 is ineffective to disturb the connection already establ'ished;

The general operat-ion oi the switch mechanism tor establishing connections between the primary and secondary contacts consistsin moving'th-e selecting bar 28 and the primary contacts 20, 21, 22 and 23 served thereby in selected position as shown by the dotted line in. the lower set of 2. When the primary contacts are-moved in selected position through the encrgization of magnet 5-3, the oscillating bar 41 is moved in an upward direction wherein the secondary contacts 33, 34,. and 86 carried thereby engage the under surface or" their associated. primary contacts 20-, 21,. 22 and 28 and move them clear oi the selecting bar 28 7 against the insulating bar provided to resist the movement of primary contacts order to increase the contact pressure between the primary and secondary contacts The selecting bar 28, however, may be im mediatcly restored to normal to participate in the establishment 0t other coexisting connections, but the bar ll and the secondary contacts 33, 34, 35 and 36 carried thereby remain in operated position throughout the duration of the connection.

lVhat is claimed is:

1. In a switching device, the combination of primary contact sets, a longitudinally movable bar therefor, an insulating strip arranged on said bar foroperatively engaging said contacts, sets of multiple contacts arranged on a circularly movable bar, and means for positioning said primary contacts for engaging said multipled contacts-upon the movement of said circularly movablebar.

2. In a switching structure, sets, of pri: mary contacts, a longitudinally movable bar for supporting and moving said contacts, sets of secondary contacts, a rotatable bar for supporting said sets of secondary con- 7 tacts, a stationary stop bar disposed adjacent and at right angles to said movable bar, means for moving said first, barto flex said sets of primary contacts into engagement with said stop bar, said stop bar being arranged to limit the, initial movement of the primary contacts, and means for moving said rotatable bar to effect an. engagement between adjacent sets of primary and secondary contacts, said. engagement being effected with a wiping action by the further flexing of said set of primary contacts.

In a telephone switch structure, the

combination of flexible contacts, individually removable insulating supports, therefor, slidable. bars: provided with apertures to permitthe protrusion,therethrough of said contacts, insulating strips fixedly supported on said bars and provided with other apertures, said second vmentioned apertures being arranged to vregister with first mentioned apertures and to provide means for insulatively supporting said contacts, a stationary stop bar disposed adjacent and at right anglesto said slidable bars, rigid contacts,

rocking bars supporting said rigid contacts,

Jneans for moving said slidable bars to ellect an interengagement of said stop bar and flexible contacts, and means for moving said 7 rocking bar to effect an interengagement of said rigid and flexing contacts.

at. In a telephone switch structure, the combination of resilient contacts, a slidable bar for moving said contacts, contacting lugs, a. rotatable bar: for moving said lugs, plates arranged with notches'to removably support said rotatable bars, hook members adjustably mounted on said plates and arranged to lock said rotatable bars to. said plates, andmeans for moving said sl'idable and rotatable bars to efiectan interengageiiu ment of said resilient members and contacting lugs.

5. In a telephone switch structure, the combination of contacting lugs, rotatable supporting bars therefor, supporting plates notched to receive said bars, arms integrally formed With said plates for normally supporting said rotatable bars in a definite position, disengaged contacts, slidable bars for positioning said contacts, stop bars for limiting the movement of said contacts, means for moving said slidable bars, and other means for rotating said lugs to effect a fur ther movement of said contacts.

In Witness whereof, I hereunto subscribe my name this 13th day of August A. D.,

HERBERT B. TAYLOR. 

